Tire building machine



Dc. 22, 1931. Q G. F. WEKLE 1,837,350

TIRE BUILDING MACHINE Filed April 2'7. 1927 A TTORNE Y.

cm i Patented Dec. 22, 1931 Umrsn STATS,

GEORGE E. WIKLE, or MILWAUKEE, WISCONSIN, Assidnon To THE FIsK RUBBER corn,

PANY, OF CHIGOIPEE FALLS, MASSACHUSETTS, A CORPQR-ATIOII OFIVLASSAGHUSETTS TIRE BUILDING MACHINE Application filed April 27;

ing pneumatic tire casings on substantially flat drums or. formers and more particularly to a device for. stitching down the carcass plies and elements, such as the tread rubber,

side walls, chafingstrips etc.

Among the objects of my invention is the provision of a device of this character in which the stitching rolls are completely within the control of the operator. Other and further objects will be apparent from the following specification and claims In the accompanying drawings which illustrate one embodiment of'my invention,

Figure 1 is a side elevation of a building machine equipped with my device and showing the latter inoperative position, I

Figure 2 is a similar view showing the device ininoperative position,

Figure 3 is a front elevation of the structure as shown in Figure 1,

Figure 4 is a detail view, partly in section showing the mounting of thestitcher and its drive, r

Figure 5 is a section on line 5-5 of Figure 3, and

ure 4.

Referring to the drawings 1 designates the by means of any suitable type of collapsingchuck 2 to a shaft 3 adapted to be rotated as desired by a motor or other source of power positioned Within the machine housing 4.

The stitching device comprises end frames 6 and 7 held in spaced relation by hollow shafts 8 and 9, shaft 8 supporting stitching rolls 10 and 11 as hereafter described. End frames 6 and 7 are pivoted at their upper ends on a shaft 12'adjustably secured at one end in a slotted bracket 13 secured to the housing 4 at 14. The device as a whole is adjustably positioned on shaft 12 by collars 15 and 16.

Stitching discs 10 and 11 are simultaneousinternally grooved at to receive an arcuateblock 21 secured as by screw 22 to a traveler Figure 6 is a section on line 66 of Figly moved toward and from each other on' 1927 ;Seria1 'No. 186,960.

23, which passes through slots formed hollow shaft 8 and rides in the threads 24. of shaft 18. Shoulders 19. are ape'rtured at 25 to permit access to screw 22. Aswill be'evident discs 10 and 11 are freely rotatable on hollow shaft 8 but rotation .of shaft 18,

through travelers 23 and blocks 21 riding in grooves 20, moves the discs transversely toward and from each other along shaft Shaft 18 is rotated by means of gear segment27, secured to one end of a shaft'28 passing through hollow shaft 9, meshing with a 1 gear 29 secured to oneend of the shaft 18. Gear segment 27 is operated by a. handle 30 secured to the opposite end of shaft 28.

The stitcher discs are swung into operative position against the tire carcass 31 on drum 1, "as shown in Figures 1 and 2, by means of a handle 82 secured to side frame 7 As will be evident, the initial setting of discs 10 and 11- and their speed of separation are completely controlled by the operator through handle 30 while the degree of pressure applied is controlled by the pressure applied to handle 32.

In stitching down the carcass plies and V tread, the drum being set in rotation in the direction of the arrows in Figures 1 and 2,

the. stitching discs are set in central position and swung against the drum by means of handle 32. Handle 30 is then operated to gradually separate the discs and stitch down the carcass plies or tread from their center to their edges. If desired the discs may be initiallyset at the edges of the carcass and moved inwardly to stitch down turned back portions of the carcass plies, or they may be applied in intermediate positions to stitch down chafing strips and the like. 7 p

I claim:

i 1. A device of the character described comrotate the threaded shaft to simultaneously move the stitcher rolls toward and from each other and a second handle secured to the frame, to swing the latter about its pivot to press the stitcher rolls against a tire carcass on the drum.

2. Stitching mechanism for a tire building machine comprising a hollow shaft provided with a longitudinal slot, a stitching roll mounted for free rotation on said shaft and provided on its bearing surface with an annular groove, a spirally grooved shaft rotatablv mounted in the hollow shaft, a block riding freely in the groove of the spirally 1 grooved shaft and extending through the longitudinal slot of the hollow shaft into the annular groove on the bearing face of the stitching disc, and means to rotate the spirally grooved shaft.

3. Stitching mechanism for a tire building machine comprising a pair of stitching rolls mounted on a common shaft for free rotation in parallel planes, and means to simultaneously more said rolls toward and from each other along said shaft to position them in selected spaced stitching relation prior to the stitching operation.

In testimony whereof I have signed my name to the above specification.

GEORGE F. WIKLE. 

